Shouldn't Diddy Kong be accepted for Donkey Kong Jr.? He's the same character, after all. The only difference is what Nintendo called him. It's like if I changed my name from Zack to John. Sure, you can call me whatever, but I'm the same person.

also...if you're going to say "every game" (as opposed to every console game) you need to include the arcade games, which also has pac-man, ms pacman, and blinky
(https://www.mariowiki.com/Mario_Kart_(series)#Characters)

It’s not trash, one of the original rules was that dlc characters weren’t counted. Dry Bowser is on the quiz, just it’s under mkwii. However, the rest of dlc’s should be counted since a) the rules been removed and b) they are in mk8d, but I’m sure QuizMaster has better things to do than update this quiz

Exactly. It's funny. I forgot I took this quiz in October, took it again, and was really mad again about the lack of DLC characters, especially since the quiz was updated since Deluxe came out AND it includes Dry Bowser and the Inkling kids now.
I do regret calling it a trash quiz. I think I was joking.... I hope. It's still a fun quiz! But it still irks me that some characters are completely missing.

You're missing Dry Bowser, Villager, Isabelle, Link, Tanooki Mario, and Cat Peach from the 8 Deluxe roster which is weird because you have Gold Mario which is a skin replacement for Metal Mario after you win all the cups at 200cc. The above characters are from the Switch version so they should definitely be included